chore(deps): update suzuki-shunsuke/renovate-config-validator-workflow action to v0.2.4 (#47)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/wc-renovate-config-validator.yaml

@@ -4,6 +4,6 @@ on: workflow_call
 jobs:
   renovate-config-validator:
     # Validate Renovate Configuration by renovate-config-validator.
-    uses: suzuki-shunsuke/renovate-config-validator-workflow/.github/workflows/validate.yaml@4a378742d05b4e67aae34039d7c779ac913cd79d # v0.2.3
+    uses: suzuki-shunsuke/renovate-config-validator-workflow/.github/workflows/validate.yaml@e8effbd185cbe3874cddef63f48b8bdcfc9ada55 # v0.2.4
     permissions:
       contents: read